— Can I pay the bill by check?— Sorry, sir. But it's the management rules of our hotel that payment ______be made in cash.

—How did he get my telephone number?—You ________ it . You told him last week．

— It’s the office! So you        know eating is not allowed here.— Oh, sorry.

In general，she is devoted to her studies，but she________be little naughty at times.

----- Must I park my car behind the building?------No, you ___________ . You ___________ park it here .